Hey guys,
Iam new to ZFS and have been playing around since few days. Iam trying to
improve performance of a iSCSI storage backend by putting the ZIL/log on a SSD.
Below are the steps i followed
# format < /dev/null
Searching for disks...
The device does not support mode page 3 or page 4,
or the reported geometry info is invalid.
WARNING: Disk geometry is based on capacity data.
The current rpm value 0 is invalid, adjusting it to 3600
done
c8t3d0: configured with capacity of 465.74GB
AVAILABLE DISK SELECTIONS:
0. c8t0d0 <DEFAULT cyl 60798 alt 2 hd 255 sec 63>
/p...@0,0/pci8086,3...@1f,2/d...@0,0
1. c8t1d0 <ATA-ANS9010_NNNN2N2N-_109-3.56GB>
/p...@0,0/pci8086,3...@1f,2/d...@1,0
2. c8t2d0 <ATA-WDC WD5002ABYS-0-3B02-465.76GB>
/p...@0,0/pci8086,3...@1f,2/d...@2,0
3. c8t3d0 <ATA-WDCWD5001ABYS-0-1D01 cyl 60799 alt 2 hd 255 sec 63>
/p...@0,0/pci8086,3...@1f,2/d...@3,0
4. c8t4d0 <ATA-TS8GSSD25S-S-6-7.45GB>
/p...@0,0/pci8086,3...@1f,2/d...@4,0
5. c8t5d0 <ATA-WDC WD5002ABYS-0-3B03-465.76GB>
/p...@0,0/pci8086,3...@1f,2/d...@5,0
6. c9t9d0 <IFT-S16E-R1130-364Q-4.55TB>
/iscsi/d...@0000iqn.2002-10.com.infortrend%3araid.sn7755270.0010001,0
7. c9t13d0 <IFT-S16E-R1130-364Q-4.55TB>
/iscsi/d...@0001iqn.2002-10.com.infortrend%3araid.sn7755270.0010001,0
8. c9t15d0 <IFT-S16E-R1130-364Q-4.55TB>
/iscsi/d...@0002iqn.2002-10.com.infortrend%3araid.sn7755270.0010001,0
9. c9t16d0 <IFT-S16E-R1130-364Q-4.55TB>
/iscsi/d...@0003iqn.2002-10.com.infortrend%3araid.sn7755270.0010001,0
Specify disk (enter its number):
# zpool create iftraid0 c9t9d0 log c8t4d0
# zfs create iftraid0/fs
# zpool status iftraid0
pool: iftraid0
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
iftraid0 ONLINE 0 0 0
c9t9d0 ONLINE 0 0 0
logs ONLINE 0 0 0
c8t4d0 ONLINE 0 0 0
errors: No known data errors
Now when i run dd and create a big file on /iftraid0/fs and watch `iostat -xnz
2` i dont see any stats for c8t4d0 nor does the write performance improves.
I have not formatted either c9t9d0 or c8t4d0. What am i missing ?
TIA
Dushyanth
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